Karsten75 said:
Once you go offsite, you may as well go with a cloud provider. I like the
Cloudberry interface and it lets you choose a cloud provider of your choice. Doing this removes many tiers of hardware failure/management/connectivity issues from your consideration.
Failing that, look for a mid-range Synology NAS device. Their UI is excellent and they provide a "private cloud"
Except the "cloud" is nothing but disk in a large data center. It's a step DOWN from properly implemented backup in your possession and should be your 3rd copy of data.
The proper hierarchy for backup to eliminate any single point of failure is to have 3 copies of your data, 2 copies on separate physical storage devices in your possession, and 1 off-site or in the cloud.
To maximize up-time/availability, you add redundancy after you've achieved those minimum standards.
1 Copy in your possession and 1 off-site even if both devices are redundant is NOT a complete solution.
If you want 10TB of storage, i would suggest the follwing solution
2 X 5TB External drives($~350) + 3 x 5TB drives in a 4-bay NAS(1 bay for future expandability) + Identical NAS off-site or Cloud Backup service
Hope that helps.